The editing facilities of this system were inspired in part by
those of
the Cornell Program Synthesizer [Teitelbaum & Reps 81] and by
AVID [Krafft 81], the system which
first applied these ideas in the setting of proof synthesis. We have
been using these
editors in the
system since 1983. We know how
to use them effectively, and while we
have not seen demonstrated a better way of generating proofs,
based on our
experience with these systems we now understand feasible ways to improve them
significantly. Research on this topic is under way in our group.